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http://dx.doi.org/10.5734/JGM.2011.8.1.35

Ten-year Clinical Study of Chorionic Villus Sampling  

Kim, Soo-Hyun (Department of Obstetrics and Gynecology, Fertility Center of CHA Gangnam Medical Center, CHA University)
Shim, Sung-Han (Genetics Laboratory, Fertility Center of CHA Gangnam Medical Center, CHA University)
Baek, Jong-Woo (Department of Obstetrics and Gynecology, Bundang CHA Hospital, CHA University)
Cha, Dong-Hyun (Department of Obstetrics and Gynecology, Fertility Center of CHA Gangnam Medical Center, CHA University)
Publication Information
Journal of Genetic Medicine / v.8, no.1, 2011 , pp. 35-43 More about this Journal
Abstract
Purpose: We evaluated indications for chorionic villus sampling (CVS), the positive predictive value of CVS for fetal chromosomal abnormalities, and the fetal loss rate after CVS at CHA Medical Center. Materials and Methods: We reviewed the medical records of 511 cases of CVS performed between 67 and 120 days of gestation for prenatal cytogenetic diagnosis from April 2000 to April 2010. Fetal karyotypes were obtained by direct and indirect culture methods. Results: The most common indications for CVS were abnormal ultrasonic findings including increased nuchal translucency (294/635, 46.3%). The positive predictive value of abnormal karyotyping according to indication for CVS was highest in cases with abnormal parental karyotypes (14/21, 66.7%). Mosaicism revealed by CVS comprised 3.1% of the sample (16/509). Amniocentesis revealed two cases of true mosaicism and 11 cases of confined placental mosaicism. The fetal loss rate within 4 weeks of the procedure was 1.2% (6/511). Conclusion: If CVS is performed by an expert clinician, it is a feasible and reliable procedure for prenatal genetic diagnosis. When CVS indicates mosaicism, the finding should be confirmed by amniocentesis to distinguish true mosaicism from confined placental mosaicism.
Keywords
Chorionic villus sampling; Prenatal genetic diagnosis;
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